mod chapter_01;
mod chapter_02;
mod chapter_03;
mod chapter_04;

fn main() {
    chapter_04::test03();
    // chapter_04::test02();
    // chapter_04::test01();
    // chapter_03::test06();
    // chapter_03::test05();
    // chapter_03::test04();
    // chapter_03::test03();
    // chapter_03::test02();
    // chapter_03::test01();
    // chapter_02::test18();
    // chapter_02::test17();
    // chapter_02::test16();
    // chapter_02::test14();
    // chapter_02::test13();
    // chapter_02::test12();
    // chapter_02::test11();
    // chapter_02::test10();
    // chapter_02::test09();
    // chapter_02::test08();
    // chapter_02::test07();
    // chapter_02::test06();
    // chapter_02::test05();
    // chapter_02::test04();
    // chapter_02::test03();
    // chapter_02::test02();
    // chapter_02::test01();

    // chapter_01::hello();
}
